Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5624988 | Process for the production of polymer-bound rubber chemicals | Armin Bauer, Hans-Joachim Graf, Anton Hartmayer, Harald Kleinknecht, Arthur Relle +1 more | 1997-04-29 |
| 5608228 | Rubber chemical preparation | Hans-Joachim Graf, Harald Kleinknecht | 1997-03-04 |
| 5314986 | Phenolic resins from bisphenol a residual resins and mixtures of chloro-substituted hydrocarbons, and the use of specific phenolic resins as homogenizers for rubber vulcanizates | Pieter Ooms, Heinrich Schrage, Hans-Josef Buysch, Hans-Joachim Graf | 1994-05-24 |